.color-square{
  height: 70px;
}
.color-square div{
  height: 50px;
  width: 50px;
  margin: 10px;
  border: none;
}
#purple{
  float: left;
  background-color: purple;
}
#blue{
  background-color: blue;
  float: left;
}
#green{
  background-color: green;
  float: left;
}
#red{
  background-color: red;
  float: left;

}